JPH0650283A - Full arc flow pump - Google Patents

Abstract

PURPOSE:To provide a full arc flow pump which can firmly support a motor disposed in a casing even if it is a pressed casing. CONSTITUTION:In a full arc flow pump where an annular passage is formed between a sheet metal pump casing and the outer peripheral part of a motor 22 provided in the pump casing, a projection 24a protruded outward is disposed on the motor frame outer drum 24 provided on the outer peripheral surface of the motor 22, and the outer surface of the projection 24a is fitted to the inner peripheral surface of the outer cylinder 9 of the pump casing to fix the motor 22 to the pump casing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a full-circulation pump
In particular, the present invention relates to an all-circumferential flow type pump having a sheet metal pump casing.

[0002]

2. Description of the Related Art An all-in-line type in-line pump is known in which an annular flow path is provided between a pump casing and a motor and a suction port and a discharge port are arranged on the same line. The pump casing of such an in-line pump includes a suction side casing, a discharge side casing, and an outer cylinder provided between the suction side casing and the discharge side casing. The suction side casing and the discharge side casing are made of cast iron or the like, and therefore these casings are generally highly rigid.

On the other hand, a canned motor is arranged in the pump casing, and the canned motor is fixed and supported by a casing made of cast metal and having rigidity.

[0004]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention In an all-circumferential flow type in-line pump having the above-mentioned casting casing,
Since the casings, especially the suction side casing and the discharge side casing have rigidity, the canned motor could be fixed and supported by these casings. However, when the casing is made of a press, there is a problem that the canned motor cannot be fixedly supported by the casing because the casing lacks rigidity.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an all-circumferential flow type pump capable of firmly supporting a motor arranged in a casing even if it is a press casing. Especially.

[0006]

In order to achieve the above-mentioned object, a first aspect of an all-circumferential flow type pump of the present invention is a pump casing made of sheet metal and an outer peripheral portion of a motor provided in the pump casing. In the all-circumferential type pump having an annular flow path formed between, a sheet metal suction side casing having a suction nozzle, and a sheet metal outer cylinder connected to the suction side casing and accommodating the motor, A fixing means for fixing the motor to the outer cylinder is provided.

A second aspect of the full-circulation pump of the present invention is that an annular flow passage is formed between a pump casing made of sheet metal and an outer peripheral portion of a motor provided in the pump casing. In the circumferential flow type pump, by providing a projection protruding outward on a motor frame outer body provided on the outer peripheral surface of the motor, and fitting an outer surface of the projection to an inner peripheral surface of an outer cylinder of the pump casing. The motor is fixed to the pump casing.

A third aspect of the full-circulation pump of the present invention is that the annular flow path is formed between the pump casing made of sheet metal and the outer peripheral portion of the motor provided in the pump casing. In the circumferential flow type pump, a protrusion projecting inward is provided on the outer cylinder of the pump casing, and the inner surface of the protrusion is fitted to an outer body of a motor frame provided on an outer peripheral surface of the motor to drive the motor. It is fixed to the pump casing.

Further, a fourth aspect of the full-circulation pump of the present invention is a pump casing comprising a suction side casing, a discharge side casing, and a cylindrical outer cylinder connecting the suction side casing and the discharge side casing. A full-circumferential pump including a motor provided in the pump casing, wherein at least one of the suction-side casing and the discharge-side casing is extended outward at an outer peripheral portion of an end portion on the opening side. A flange portion is provided, and a flange for sandwiching the flange portion together with a counterpart component to fix the suction side casing or the discharge side casing is provided, and the flange is provided outward on a motor frame outer body provided on the outer peripheral surface of the motor. Protrusions or protrusions protruding inward from the outer casing of the pump casing are provided, and at least one of the suction side casing and the discharge side casing is provided with the protrusion. It is characterized in the provision of the engagement member for engagement.

A fifth aspect of the full-circulation pump of the present invention includes a pump casing having a suction side casing and a cylindrical outer cylinder, and a motor provided in the pump casing. In the all-circumferential type pump, a reinforcing band for preventing deformation of the outer cylinder due to internal pressure is attached to an outer peripheral portion of the outer cylinder.

[0011]

According to the first aspect of the present invention having the above-mentioned structure, the motor is fixed to the outer casing of the pump casing by the fixing means. According to the second aspect of the present invention,
The outer frame of the motor frame is provided with a protrusion that projects outward, the outer surface of this protrusion is fitted to the inner peripheral surface of the outer cylinder of the casing, and the motor is fixed to the casing by joining the two at this fitting portion. can do. Therefore, since the motor is fixed to the cylindrical outer cylinder via the motor frame outer case whose rigidity is strengthened by the protrusion, the motor is firmly supported by the pump casing.

Further, according to the third aspect of the present invention, an inwardly projecting protrusion is provided on the outer cylinder of the pump casing, and the inner surface of this protrusion is fitted to the outer peripheral surface of the outer casing of the motor frame of the motor. The motor can be fixed to the casing by joining the two at the fitting portion. Therefore, the motor is fixed to the cylindrical outer casing of the pump casing, the rigidity of which is enhanced by the protrusion, so that the motor is firmly supported by the pump casing.

Further, according to the fourth aspect of the present invention, the engagement member provided on the suction side casing or the discharge side casing is provided with a protrusion provided on the outer casing of the motor frame or a protrusion provided on the outer casing of the pump casing. By engaging with, it is possible to prevent the suction side casing or the discharge side casing from rotating against an external force such as a torsional external force.

Further, according to the fifth aspect of the present invention, since the reinforcing band is attached to the outer cylinder of the pump casing, the deformation of the outer cylinder due to the internal pressure can be suppressed, and the rib formed on the outer casing of the motor frame can be suppressed. The load on the joint of the pump casing with the outer cylinder can be reduced, and the plate thickness of the outer cylinder can be reduced. Moreover, since the reinforcing band is formed by forming the flat band material into a cylindrical shape, the yield of the plate material can be improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the full-circulation pump according to the present invention will be described below with reference to FIGS. FIG. 1 is a sectional view showing an all-circumferential flow type in-line pump of the present invention. The in-line pump shown in the present embodiment has a suction side casing 1
And a discharge side casing 5, and an outer cylinder 9 connecting between the suction side casing 1 and the discharge side casing 5. The suction side casing 1 and the discharge side casing 5 are formed by deep drawing a steel plate such as stainless steel by pressing.

The suction-side casing 1, the outer cylinder 9 and the discharge-side casing 5 are provided with flange portions 1a, 9a, 9b and 5a, respectively, extending outward at the outer peripheral portions of the end portions on the opening side. . And, the suction side casing 1 and the outer cylinder 9 are
The flange portions 1a and 9a adjacent to each other are sandwiched by flanges 20A and 20B made of cast iron or the like and fastened by bolts 37, so that they are integrally connected. Similarly, the discharge side casing 5 and the outer cylinder 9 have flanges 2a and 9b, which are adjacent to each other, made of cast metal such as cast iron.
It is connected by being clamped by 1A and 21B and tightened by a bolt 37.
The flanges 20B and 21B are composed of halved flanges. The suction side casing 1, the discharge side casing 5, and the outer cylinder 9 constitute a sheet metal pump casing, and a canned motor 22 is arranged in the pump casing.

The suction side casing 1 is provided with a main body 2 on a truncated cone and a cylindrical suction nozzle 3 extending from the main body 2 to the suction side. Similarly to the suction-side casing 1, the discharge-side casing 5 also includes a truncated cone-shaped main body portion 6 and a cylindrical discharge nozzle 7 extending from the main body portion 6 to the suction side. . The discharge-side casing 5 and the suction-side casing 1 are formed in exactly the same size and shape.

On the other hand, an inner casing 10 made of sheet metal is provided inside the suction side casing 1. The inner casing 10 has a container-shaped main body 11 and extends from the main body 11 to the suction side. It is composed of a cylindrical suction side portion 12. A guide device 13 that constitutes a guide vane or volute is installed inside the main body 11 of the inner casing 10. The guide device 13 has a spigot fitting portion, and the spigot fitting portion is fitted to the motor frame 23 of the canned motor 22. The motor frame 23 of the canned motor 22 has a high rigidity, and the guide device 13 is supported by the motor frame outer case 23. As a result, the inner casing 10 is a motor of the canned motor 22 having a high rigidity. Outer frame 23
Will be supported by. One end of the suction side portion 12 of the inner casing 10 extends to the vicinity of the suction nozzle 3. The seal member 1 is provided in the gap between the end of the suction side portion 12 of the inner casing 10 and the suction nozzle 3 of the suction side casing 1.
4 is interposed, and the suction side (low pressure side) and the discharge side (high pressure side) are sealed by this seal member 14.

An impeller 15 is housed inside the inner casing 10. The impeller 15 is a canned motor 22.
Is fixed and supported by the main shaft 16 of the. A swirl prevention plate 18 is fixed inside the suction side portion 12 of the inner casing 10. A liner ring 19 is arranged adjacent to the main body portion 11 of the inner casing 10 and the suction side portion 12, and the liner ring 19 and the end edge portion 1 of the impeller 15 are arranged.
A slight clearance is formed between the groove and 5a.

The suction nozzle 3 and the discharge nozzle 7 are respectively provided with a suction flange 47 through an intermediate ring 46.
And the discharge flange 48 are fixed. That is, the intermediate ring 46 is made of the same material as the casing body, such as stainless steel, and has the opening 46a and the recess 46b.
And a male screw portion 46c, and a front end surface thereof is a sealing surface 46s with a mating flange (not shown). Then, the small diameter portion 3b (or 7b) of the suction nozzle 3 (or the discharge nozzle 7) is joined by welding to the opening portion 46a of the intermediate ring 46, and the concave portion 46b of the intermediate ring 46 constitutes a spigot fitting portion. The large diameter portion 3a (or 7a) of the suction nozzle 3 (or the discharge nozzle 7) is fitted into 46b and joined by welding. On the other hand, the suction flange 47 and the discharge flange 48 are made of a material different from that of the casing body, for example, cast iron (FC) or the like, and have internal thread portions 47a and 48a at their inner ends, respectively. , 48a are screwed and fixed to the intermediate ring 46.

The motor frame 23 of the canned motor 22 has a substantially cylindrical frame outer case 24, and frame side plates 25, 2 provided at both side openings of the frame outer case 24.
6 and 6. As shown in FIGS. 2 and 3, the frame outer case 24 has a plurality of projections 24a formed radially on the outer peripheral surface thereof along the axial direction. The plurality of projections 24a are formed integrally with the motor frame outer case 24 by press molding, and the outer surfaces of these projections 24a are fitted to the inner peripheral surface of the outer cylinder 9 of the pump casing, and the fitting is performed. In the part, both are joined and integrated by spot welding or the like.

A lead wire outlet 24b is formed on one of the protrusions 24, and the lead wire outlet 24b is formed.
The lead wire of the motor is taken out from the motor, and the lead wire passes through the opening 9c formed in the outer cylinder 9 and passes through the flange 21.
It is adapted to be taken out to a terminal box 38 formed integrally with B.

A stator 27 and a rotor 28 are arranged in the motor frame 23 of the canned motor 22. The rotor 28 is supported by the main shaft 16,
A cylindrical can 29 is fitted inside the stator 27. A radial bearing 30 is provided on the frame side plate 25, and the radial bearing 30 rotatably supports a shaft sleeve 31 fitted to the main shaft 16.

A bearing housing 32 is detachably provided on the frame side plate 26, and an O-ring 40 made of an elastic material is interposed between the bearing housing 32 and the frame side plate 26. The bearing housing 32 and the frame side plate 26 are fixed by a clearance-fitting spigot and an O-ring 40 made of an elastic material. The bearing housing 32 is prevented from coming off from the frame side plate 26 in the axial direction by a pressing plate 41. An elastic member 42 is interposed in the axial gap between the bearing housing 32 and the frame side plate 26. The bearing housing 32 holds a radial bearing 33 and a fixed thrust metal 34, respectively, and the radial bearing 33 rotatably supports a shaft sleeve 35 fitted to the main shaft 16.

On the other hand, at the discharge side end of the main shaft 16, two thrust disks 36 and 37 are fixed so as to sandwich the bearing housing 32, and the thrust disk 36 constitutes a fixed side thrust sliding member. Radial bearing 3
3 is provided with a rotating-side thrust metal 38 facing the end face of 3,
The thrust disk 37 is the fixed side thrust metal 34.
And a rotation-side thrust metal 39 opposed to.

The operation of the inline pump will be briefly described. The fluid sucked from the suction nozzle 3 is guided into the impeller 15 through the suction side portion 12 of the inner casing 10. The fluid discharged from the rotating impeller 15 is formed between the outer cylinder 9 and the motor frame outer case 24 of the canned motor 22 after the flow direction is changed from the radial direction to the axial direction via the guide device 13. Flow into the annular flow path 45,
It flows into the discharge side casing 5 through the flow path 45. Then, the fluid is discharged from the discharge nozzle 7 formed integrally with the discharge side casing 5.

According to the present embodiment, no special parts are needed to fix and support the canned motor 22 to the pump casing, so that the number of parts can be reduced. Further, since the outer surface of the projection 24a formed on the outer casing 23 of the motor frame and the outer cylinder 9 of the pump casing can be fitted to each other and at least one place of this fitting portion can be joined by spot welding or the like, welding work can be performed. It's easy. Further, by forming the protrusion 24a on the motor frame outer case 24, the rigidity of the motor frame outer case 24 itself is improved.

Next, a second embodiment of the present invention will be described with reference to FIGS.
Will be described with reference to. In the present embodiment, the protrusions 24a formed on the motor frame outer case 24 are intermittently provided along the axial direction. Two intermittent projections 24
The flat portion 24c between a and 24a keeps a perfect circle and is in contact with the stator 27. Further, the protrusions 24a, 24a divided into two parts have the same size and shape. As shown in FIG. 5, the protrusions 24a are provided at three locations on the circumference, and the maximum outer diameter dimension of the protrusions 24a and the inner diameter dimension of the outer cylinder 9 of the casing are set to be press fit or more. ing. If the number of protrusions 24a is four or more, it is difficult to secure the accuracy of the outer diameter of the protrusion and the inner diameter of the outer cylinder, and the productivity is greatly reduced. If it is forcibly welded, the internal stress remains due to the incorrect accuracy, and the durability deteriorates. Also, the protrusion 2
A lead wire outlet 24b is formed in one of the wires 4a, and the lead wire of the motor is taken out from the lead wire outlet 24b. The other structure is similar to that of the embodiment shown in FIGS.

According to this embodiment, the flat portion 24c between the projections 24a, 24a formed intermittently secures the rigidity of the motor frame outer case 24 when the stator core is press-fitted, and as a result, the tightening force of the stator core is increased. Secure. Further, even when the motor output (Mkw) changes and the product thickness (L) of the stator core changes, the protrusion die is moved in the axial direction when the outer casing 24 of the motor frame is formed, thereby increasing the product thickness of the stator core. Regardless, a common protrusion die can be used.

Further, according to this embodiment, both the motor frame outer case 24 and the pump casing outer case 9 are press-molded products. Therefore, when the motor frame outer case 24 is press-fitted into the pump case outer case 9, respectively. The plurality of protrusions 24a are in contact with the inner surface of the outer cylinder 9 in accordance with the above dimension, and the welding strength can be reliably managed.

Next, a third embodiment of the present invention will be described with reference to FIGS. 6, constituent elements having the same functions and functions as those of the constituent elements of FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. In this embodiment, a plurality of protrusions 9 protruding inward are provided on the inner peripheral surface of the outer cylinder 9 of the pump casing.
d is formed. The plurality of protrusions 9d are integrally formed on the outer casing 9 of the pump casing by press molding as shown in FIGS.
The inner side surface of d is fitted to the outer peripheral surface of the motor frame outer case 24, and at the fitting portion, both are joined and integrated by spot welding or the like.

Further, in this embodiment, one protrusion 24a is formed on the outer casing 24 of the motor frame, and a lead wire outlet 24b is formed in this protrusion 24a. The lead wire is taken out, and this lead wire is taken out to the terminal box 38 fixed to the outer cylinder 9 through the opening 9c formed in the outer cylinder 9.

In this embodiment, the inner casing 10 is composed of a partition plate 11a on the suction side and a guide device 12a. Further, a bearing housing 52 is detachably provided on the load side frame side plate 25, similarly to the anti-load side, and the bearing housing 52 and the frame side plate 2 are attached.
An O-ring 53 made of an elastic material is interposed between the five.

In the embodiment shown in FIGS. 1 to 5, an air layer is formed between the stator of the motor and the projection 24a provided on the motor frame outer case 24 for fitting with the outer cylinder 9. there is a possibility. Since air has lower thermal conductivity than metal, the cooling effect of the motor may be deteriorated by the amount of the protrusion. According to this embodiment, the stator and the motor frame are entirely in contact with each other except for the lead wire take-out protrusion, so that the cooling effect of the motor is improved. Therefore, the motor can be downsized.

Next, a fourth embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to 0. In this embodiment, all the protrusions are provided on the outer casing 9 of the pump casing. That is, the projection 9d of the lead wire extraction portion is also provided on the outer cylinder 9. An opening 9c for taking out the lead wire is provided at a portion of the protrusion 9d corresponding to the lead wire taking-out port 24b of the outer frame 24 of the motor frame. According to this embodiment, since the stator and the motor frame are entirely in contact with each other, the motor cooling effect is further improved.

Next, a description will be given of an embodiment provided with a rotation stopping mechanism for preventing rotation of the suction side casing and the discharge side casing and a reinforcing band with reference to FIGS. 11 to 13. The all-circumferential flow type inline pump shown in FIG. 11 has substantially the same structure as the all-circumferential flow type inline pump shown in FIG. And the description is omitted. 12 is shown in FIG.
It is a top view which shows the principal part of 1.

At the opening-side ends of the suction side casing 1 and the discharge side casing 5, as shown in FIGS. 11 and 12, an engaging member 43 having a U-shaped notch 43a at its tip end is formed.
Are fixed by welding. Then, the engaging member 43
The notch 43a is engaged with a projection 24a formed on the motor frame outer case 24. As a result, the suction side casing 1 and the discharge side casing 5 have the flanges 20,
A rotation stop is made to 21. Note that FIG. 12 is a top view of the suction side casing 1, the engaging member 43, and the protrusion 24a with the outer cylinder 9 removed. According to the present embodiment, it is not necessary to form a notch for rotation prevention in the flange portions 1a, 5a of the casings 1, 5, so the size of the flange portions 1a, 5a can be reduced. The inner casing 10 of this embodiment is divided into a main body portion 11a and a suction side portion 12a, and a seal member 44 is interposed at the connecting portion. The outer cylinder 9 may be provided with a protrusion, and the engagement member 43 may be engaged with this protrusion.

Further, in this embodiment, the ribs 24a, 2
Between 4a, a reinforcing band 55 for preventing deformation of the outer cylinder due to internal pressure is joined to the outer peripheral portion of the outer cylinder 9 of the pump casing by welding or the like. Reinforcing band 55
Is formed by forming a flat strip into a cylindrical shape as shown in FIG. Since the motor frame 23 and the outer casing 9 of the pump casing receive loads in the opposite directions, that is, the motor frame 23 receives an external pressure and the outer casing 9 receives an internal pressure, the joint portion between the rib 24a and the outer casing 9 is pulled. Receive a load. At this time, when the reinforcing band 51 is not provided, if the distance between the adjacent ribs 24a, 24a is long, the deformation of the outer cylinder 9 becomes large and the tensile load applied to the joint becomes large. Higher strength is required. However, in this embodiment, since the reinforcing band 55 prevents the outer cylinder 9 from being deformed by the internal pressure, it is not necessary to provide the joint portion with high strength, and the plate thickness of the outer cylinder 9 can be reduced.

In the embodiment shown in FIGS. 1 to 13,
Although the present invention is applied to the all-circumferential type in-line pump, the pump type is not limited to this, and it is also applicable to, for example, a double-suction all-circumferential type pump.

[0040]

As described above, according to the first aspect of the present invention, the motor can be firmly fixed to the outer cylinder of the pump casing by the fixing means. Further, according to the second aspect of the present invention, the motor frame outer body is provided with a projection protruding outward, and the outer surface of the projection is fitted to the inner peripheral surface of the outer cylinder of the pump casing, and the fitting is performed. The motor can be fixed to the pump casing by joining them together at the part. Therefore, since the motor is joined to the outer casing of the pump casing via the outer casing of the motor frame whose rigidity is enhanced by the protrusion, the motor is firmly supported by the pump casing.

Further, according to the present invention, since the protrusion can be integrally provided on the outer casing of the motor frame by press molding, it is easy to manufacture, and the protrusion allows the motor to be joined to the outer cylinder of the pump casing. Since no special parts are required to fix the motor, the number of parts can be reduced and the welding work is extremely easy.

Further, according to the present invention, the projections formed intermittently secure the rigidity of the outer casing of the motor frame when the stator core is press-fitted, and as a result, secure the tightening force of the stator core. Further, even if the motor output (Mkw) changes and the product thickness (L) of the stator core changes, the protrusion die is moved in the axial direction during molding of the motor frame outer case,
A common protrusion die can be used regardless of the laminated thickness of the stator core.

Furthermore, according to the present invention, both the motor frame outer casing and the pump casing outer casing are press-molded products. Therefore, when the motor frame outer casing is press-fitted into the pump casing outer casing, the respective dimensions are followed. However, all of the plurality of protrusions come into contact with the inner surface of the outer cylinder, and the welding strength can be reliably managed.

According to the third aspect of the present invention, an inwardly projecting protrusion is provided on the outer cylinder of the pump casing, and the inner surface of this protrusion is fitted to the outer peripheral surface of the outer casing of the motor frame of the motor. At the same time, the motor can be fixed to the casing by joining the two at the fitting portion. Therefore, the motor is fixed to the cylindrical outer casing of the pump casing, the rigidity of which is enhanced by the protrusions, so that the motor is firmly supported by the pump casing. Moreover, since the stator of the motor and the motor frame are entirely in contact with each other, the cooling effect of the motor is improved.

Further, according to the fourth aspect of the present invention, the engaging member provided on the suction side casing or the discharge side casing is provided with a protrusion provided on the outer casing of the motor frame or a protrusion provided on the outer casing of the pump casing. By engaging with, it is possible to prevent the suction side casing or the discharge side casing from rotating against an external force such as a torsional external force.

Further, according to the fifth aspect of the present invention, since the reinforcing band is attached to the outer casing of the pump casing, the deformation of the outer casing due to the internal pressure can be suppressed, and the rib formed on the outer casing of the motor frame can be suppressed. The load on the joint of the pump casing with the outer cylinder can be reduced, and the plate thickness of the outer cylinder can be reduced.
In addition, the reinforcing band is made by molding a flat strip into a cylindrical shape,
The yield of plate material can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of an all-circumferential flow pump according to the present invention.

FIG. 2 is a sectional view showing a motor frame and an outer cylinder in the first embodiment of the present invention.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view showing a motor frame and an outer cylinder in a second embodiment of the present invention.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a sectional view showing a third embodiment of the full-circumferential flow pump according to the present invention.

FIG. 7 is a sectional view showing a motor frame and an outer cylinder according to a third embodiment of the present invention.

8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a sectional view showing a fourth embodiment of an all-circumferential flow pump according to the present invention.

FIG. 10 is a sectional view showing a motor frame and an outer cylinder in a fourth embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a rotation stopping mechanism of a casing in an all-circumferential flow pump according to the present invention.

12 is an enlarged plan view of an essential part of FIG.

FIG. 13 is a perspective view of a reinforcing band provided on the casing outer cylinder.

[Explanation of symbols]

 1 Suction Side Casing 3 Suction Nozzle 5 Discharge Side Casing 7 Discharge Nozzle 9 Outer Cylinder 10 Inner Casing 13 Guide Device 14 Sealing Member 15 Impeller 16 Spindle 22 Canned Motor 23 Motor Frame Outer Body 24a Protrusion 27 Starter 28 Rotor 30, 33 Radial Bearing 32 bearing housing 43 engaging member 46 intermediate ring 47 suction flange 48 discharge flange 50 reinforcing band

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number FI Technical display location F04D 29/44 D 7314-3H (72) Inventor Yoshio Miyake 4-2 Motofujisawa, Fujisawa City, Kanagawa Prefecture No. 1 Incorporated EBARA Research Institute (72) Inventor Kikuichi Mori 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Inside EBARA CORPORATION (72) Inventor Masago Katsuta 11-1 Haneda-Asahi-cho, Ota-ku, Tokyo No. EBARA CORPORATION (72) Inventor Hiromi Sakagami 4-2-1 Honfujisawa, Fujisawa City, Kanagawa Prefecture Ebara Research Institute Ltd. (72) Inventor, Koji Isemoto 4-Fujisawa, Fujisawa City No. 1 Stock company Ebara Research Institute

Claims (11)

[Claims] 1. A full-circulation pump in which an annular flow path is formed between a pump casing made of sheet metal and an outer peripheral portion of a motor provided in the pump casing, the suction made of sheet metal having a suction nozzle. An all-circumferential flow pump, comprising: a side casing; a sheet metal outer cylinder connected to the suction side casing to accommodate the motor; and a fixing means for fixing the motor to the outer cylinder. 2. A full-circumferential flow type pump, wherein an annular flow path is formed between a sheet metal pump casing and an outer peripheral portion of a motor provided in the pump casing, the outer peripheral surface of the motor being provided. A protrusion protruding outward is provided on the outer casing of the motor frame, and the motor is fixed to the pump casing by fitting the outer surface of the protrusion to the inner peripheral surface of the outer cylinder of the pump casing. Circulating pump. 3. A full-circumferential flow type pump in which an annular flow path is formed between a pump casing made of sheet metal and an outer peripheral portion of a motor provided in the pump casing. An all-circumferential flow type in which the motor is fixed to the pump casing by providing a protrusion protruding on the inner surface of the protrusion and fitting an inner surface of the protrusion to an outer body of a motor frame provided on an outer peripheral surface of the motor. pump. 4. The full-circumferential flow pump according to claim 2, wherein at least one portion is joined to the outer cylinder of the pump casing and a fitting portion of the motor frame outer body of the motor. 5. The full-circulation pump according to claim 2, wherein the protrusion is provided with a lead wire outlet for taking out a lead wire of the motor. 6. The full-circumferential flow pump according to claim 2, wherein the protrusion is provided intermittently in the axial direction. 7. The full-circumferential flow type pump according to claim 2, wherein three protrusions are provided on the circumference. 8. The full-circumferential flow pump according to claim 2, wherein at least a part of the stator core is supported by a portion of the outer casing of the motor frame where the protrusion does not exist over the entire circumference. 9. A pump casing comprising a suction side casing, a discharge side casing, a cylindrical outer cylinder connecting the suction side casing and the discharge side casing, and a motor provided in the pump casing. In the peripheral flow type pump, at least one of the suction side casing and the discharge side casing is provided with a flange portion extending outward at an outer peripheral portion of an end portion on the opening side, and the flange portion is clamped together with a counterpart component. A flange for fixing the suction side casing or the discharge side casing, and a protrusion protruding outward on the outer casing of the motor frame provided on the outer peripheral surface of the motor or a protrusion protruding inward from the outer casing of the pump casing. And at least one of the suction side casing and the discharge side casing is provided with an engaging member that engages with the protrusion. Type pump. 10. A full-circulation pump including a pump casing having a suction side casing and a cylindrical outer cylinder, and a motor provided in the pump casing, wherein an outer peripheral portion of the outer cylinder has A full-circulation pump equipped with a reinforcing band for preventing deformation of the outer cylinder due to internal pressure. 11. The reinforcing band is formed by forming a flat band material into a cylindrical shape.
All-circumferential flow pump described.